Industrial Fan Applications
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DE-DUSTING
How are the fans used in the process ? De-dusting is the most diverse market for industrial centrifugal fans: from small fume exhaust installations to heavy duty applications using high kW motors, dedusting requires the broadest variety of fan types.
Functioning principles: 1) The system can work as a pressure-type system, (See Fig 1) with dust or particles moving through the fan (typical of wood industries / workshops). 2) The system can work as a depression-type system, where particles are eliminated either through a simple kiln where the fan is often directly mounted on top of the cyclone (See Fig 2), or through a more complex system with compartments inside the filter, relayed by the introduction of air to eliminate airborne particles (see Fig 3).
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DE-DUSTING
What are the technical characterises of the fan ? In pressure-type systems, like in the wood industry, as all particles travel directly through the fan, the impeller must be equipped with radial blades (T-type Blades), and very often mounted without any shroud, to avoid particles becoming attached within the fan. Robustness of the fan and material thickness are important elements of fan design. Fans located after the cyclone and/or within filtering systems, can have backward inclined, airfoil or flat blades due to the clean air environment. The most important characteristics of the fan are low noise levels and high efficiency so users get the best performance from the installation, avoiding the use of silencers or acoustic insulation.
Our offer: Centrifugal fans in a variety of arrangements: • Arrangement 5 (direct drive with flanged motors). • Arrangement 4 (direct drive with foot motors). • Arrangement 1 (belt drive). • Arrangement 8 (coupling drive).
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PAINT BOOTHS
How are the fans used in the process ? Fans installed in painting applications can vary depending on their location within the process: A) For air supply in the spray booth cabins, double inlet centrifugal fans are used. B) Single inlet fans with a special antiadhesive coating are used for “dirty air extraction”. C) Re-circulating fans (called plug types) are installed in ovens to keep an even temperature inside. These last 2 types must have a dismountable casing design, with easily accessible impellers to enable cleaning.
For drying and cooling, two alternative solutions are considered: 1) double inlet centrifugal fans equipped with frequency inverters. 2) large axial flow fans with adjustable-pitchin-motion impellers.
Our offer: Belt driven Centripal EU with accessible impeller for cleaning. Centripal EU double inlet for drying and cooling. Centrimaster GT for fresh air introduction via air supply plenums. Europal for incinerators such as e-dip baths. Axicos (axial fans with adjustable-pitch-in-motion) that deliver variable flows in the cooling systems.
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GLASS INDUSTRY
How are the fans used in the process ? Fans installed throughout the process are usually of a centrifugal type. At the start of the process, a large centrifugal fan is used to cool the oven walls. A high pressure fan is installed to introduce fresh air inside the oven to allow for correct combustion. The following fan is a high temperature type (400 to 500°C), exhausting hot gasses from the oven. Inside the oven itself, some recirculating fans are often used to maintain a homogenous temperature.
Following the oven, depending on glass type, either: • Glass is slowly cooled directly after the oven through medium pressure / high volume centrifugals (windows, flat glass), or through high pressure types in the case of the car glass industries for example. • Glass flows from the ovens to be distributed in different moulds, such as in bottle production. In this case, boilers are installed along the process to maintain liquid glass at the right temperature. Fans provide fresh air to the boilers and are called “conveyors”. The final fans installed in this system are high pressure blowers for mould cooling. A “flat aerodynamic curve” is needed to keep the same pressure on the different moulds, whatever the number of moulds installed or which are functioning at the same time.
Our offer: Fans are of a quite heavy duty type, and have to be robust, efficient and reliable. A complete range of motor powers is also necessary up to a few hundred kWs. Direct, belt and coupling drive arrangement are needed because of temperature, mechanical life time and cycle conditions. Centripal EU, Europal and Technopal fans are all used for this application.
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CHEMICALS PETROCHEMICALS
How are the fans used in the process ? Fans used in chemical or petrochemical applications are usually of a heavy duty type. Often of stainless steel construction, the fans are used to exhaust corrosive, high temperature or hazardous gasses from the process. Fans located within such environments must now be compliant with the ATEX norm and constructed to ensure optimum safety. Fans can be classified for use in zone 1 or zone 2, with motors ranging from EexNa range to Eexd II CT6, and constructed with an anti-spark design, combining the right material pairings in compliance with ATEX requirements in terms of safety.
Our offer: Flakt Woods offers a complete range of ATEX compliant fans, and is one of the pioneers of this application, being integral to the development of this new standard. Fans must be highly reliable and efficient, often of a high pressure type, capable of withstanding high corrosion environments, often to following API norms outside Europe for petroleum companies. Special shaft seals, special materials, tailor made executions characterise the design of these fans. Centripal EU , Europal , Single or Two Stage Technopal fans are suitable for these applications. JM Aerofoils are often used in less harsh environments.
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AGRICULTURE & SILOS
What are the fans made for in the process ? Fans for agriculture tend be of axial type for the ventilation of livestock buildings to maintain the livelihood of pigs and poultry, through the provision of fresh air and removal of harmful contaminated air. For grain drying, light centrifugal fans are common, mostly of a double inlet type in a non-welded execution, or two-stage axial flow fans are used. In silo applications, medium pressure / high volume centrifugal fans are needed. Fans are of a fully welded design, and must be compliant with the new ATEX regulations. As these fans are now considered as being located in a hazardous environment, their construction must follow ATEX Norm for the dust environment and depend on the location of the fan, Zone 21 or Zone 22, and whether the fan is in an extracting or blowing mode.
Our offer: 2100 series for building ventilation. JM axial flow fans single stage or double stage for grain drying or for larger building ventilation. GT centrifugal fans in a non ATEX grain drying. JM and Centripal EU for ATEX version.
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BOILERS AND OVENS
How are the fans used in the process ? Fans for industrial boilers are used to introduce fresh air into the boiler in order to allow the proper maintenance of oxygen levels necessary for the gas combustion. Inlet guide vanes are used to regulate intensity and pressure, depending on the required temperature. Fan curves have to be of an anti-stall type. These industrial boilers are dedicated to oven applications, for glass or metal industries. Inside the oven, re-circulating fans are used to maintain uniform temperatures. Large centrifugal fans are also used for cooling oven wall cooling, allowing a longer lifetime.
Our offer: Fläkt Woods has a complete range of high pressure direct driven centrifugal fans in the EU range. The main advantage over the competition is the ability to provide a direct driven solution up to 1400 mm diameter. Due to our vast experience in ovens, and special materials and alloys, we are able to provide customers with solutions up to 800°C continuous in re-circulating fans.
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TEXTILE
What are the fans made for in the process ? Fans for agriculture tend be of axial type for the ventilation of livestock buildings to maintain the livelihood of pigs and poultry, through the provision of fresh air and removal of harmful contaminated air. For grain drying, light centrifugal fans are common, mostly of a double inlet type in a non-welded execution, or two-stage axial flow fans are used. In silo applications, medium pressure / high volume centrifugal fans are needed. Fans are of a fully welded design, and must be compliant with the new ATEX regulations. As these fans are now considered as being located in a hazardous environment, their construction must follow ATEX Norm for the dust environment and depend on the location of the fan, Zone 21 or Zone 22, and whether the fan is in an extracting or blowing mode.
Our offer: 2100 series for building ventilation. JM axial flow fans single stage or double stage for grain drying or for larger building ventilation. GT centrifugal fans in a non ATEX grain drying. JM and Centripal EU for ATEX version.
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WOOD and PAPER
How are the fans used in the process ? Wood transformation to create Pulp and Paper industry is a tough environment requiring reliable and efficient performance. Fans for wood industries can be of axial types to dry wood before its transformation, or of centrifugal type, and used as de-dusters in the transformation process. For the paper industry, paper is continuously running on rolls at a speed which depends on quality and type of paper produced.
Fans in this process are used to dry the paper along the process: • either exhausting air, creating a depression under paper paste (i.e high pressure fans (8000 to 10000 Pa), with a stainless steel construction. • or paper paste is going through an oven and standard construction fans of medium pressure and 160°C continuous and are used for air circulation to evacuate calories.
Our offer : Wood industry: JM axial flow fans range in stainless steel or galvanised version. Centripal EU equipped with T blades for de-dusting matters during wood transformation process.
Paper industry: Centripal EU medium and high pressure types, in stainless steel or mild steel versions for paper drying.
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INCINERATION PLANTS
How are the fans used in the process? Primary fans are used, just like for industrial boilers, for the provision and maintenance of air necessary for the correct combustion of the incinerators. They are of a high pressure type , up to 30 000 Pa.
Fans are also used as: • ID fans. • primary air fans. • secondary air fans. • exhausters of high temperature type, up to 350 °C.
Our offer: Fläkt Woods offers a complete range of heavy duty fans, from Europal to Technopal fans, depending on duty requested, from 800 to 5000 mm impeller diameter, capable to withstand temperature and tough working conditions.
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MICRO-CHIPS
How are the fans used in the process ? Fans for micro chips are used along the process as exhausters. Production of the micro-chips is very corrosive, and gasses have to be treated before being rejected in the air, through very complicated filtering systems. Centrifugal fans in special stainless steel and Allard coating are used as: • Hot gasses exhausters. • Acid gas exhausters. • Ammoniac exhausters. • Solvents exhausters. All those fans have to be equipped with inlet guide vanes for production capacity regulation. Otherwise, for fresh air introduction in the building, large axial flow fans with adjustable-pitch-in-motion impellers are used to follow production rhythm, without stopping the fan.
Our offer: Fläkt Woods offers a complete range of centrifugal fans, from Centripal EU and Europal range, stainless steel versions or with special coating, and Axicos as axial flow fans range with adjustable pitch in motion impellers.
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FOOD INDUSTRY
How are the fans used in the process? Fans in food industry can be of both axial and centrifugal type. Depending on their location and their role inside the process, low, medium or high pressure types can be requested. As they are in a food environment, the material of the fan tends to be either in a stainless steel construction, or in aluminium. Certain epoxy coatings can be also suitable in some processes. In the food processing industry, fans are usually needed for drying (blowers) or exhausting the water content from the raw food. For example in pasta or milk-powder production, hot gasses have to be blown onto the food in order to get rid of all water content, which guarantees the food is conserved before being packaged.
Our offer : Stainless steel centrifugal and axial flow fans, part of the JM and Centripal EU range. High efficiencies and low noise levels are essential characteristics of fans for this industry.
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HEAT TRANSFERS REFRIGERATION COOLERS
What are the fans made for in the process ? Fläkt Woods offers a wide selection of innovative products specifically designed for a variety of heat transfer applications, ensuring OEMs and end users obtain exact and independently certified performance to suit their specific needs. Through engineered solutions for applications such as chillers, coolers, condensers, transformer cooling and cooling towers for use in a variety of industries, Fläkt Woods has served the market for many years. Fully integrated products developed for optimum customer solutions, evolving and developing constantly with changing customer requirements, make us the leader in the field. Wide expertise in market applications has been built up through close working relationships with our customers, enabling us to offer the highest performance and efficiency coupled with lowest installed sound levels ensure products meet market expectations.
Our Offer : Compac Climafan; Aerofoil Climafan; 2100 Series Fläkt Woods offers a wide range of axial flow fans to satisfy most heat transfer applications. Our products are specifically designed to provide the widest coverage of performance characteristics, coupled with the lowest noise levels, ensuring that most customer requirements are satisfied.
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MARINE & OFFSHORE
What are the fans made for in the process ? Fans in Marine and Offshore environments are used to create ventilation and comfort in the cabins, and for the machineries areas. Fans located in those environments are operating in tough conditions: salt and humidity are corrosive, and continuously attacking materials. Moreover, as maintenance is a critical point in terms of accessibility, availability of spares and of technical people, design of the fans must be thought to be first class quality in terms of vibrations, sound levels and lifetime. This is particularly true for fans located in submarines, where each single movement / noise is creating turbulances which can be seen on radars. Fans can also be located in hazardous environments e.g. in offshore platforms, and engineering companies tend to ask for explosion proof technologies. Stainless steel designs 304L, 316L are a must to face these critical ambient conditions, and Eexd motors are often requested.
Our offer: Fläkt Woods has all the products needed, from a complete HVAC system to a stainless steel JM axial or EU centrifugal fan in stainless steel execution, which can be equipped with inlet guide vanes regulation.
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MACHINERY MANUFACTURERS - OEM"s
How are the fans used in the process ? A lot of industrial machineries require fans for cooling, blowing, exhausting: in essence they create the air movement necessary for the proper machinery functioning. The OEM customer requests a particular duty point to have the best output from his machinery. The role of the fan manufacturer is then to take into account the environment in which the customer’s machine is to be used to determine the optimum proposition. After prototyping, validation and qualification of the OEM machine, the fan manufacturer then produces as many fans as the OEM produces machines. Field of applications is wide: producers of road sweepers, power generators, heat exchangers, building site machines, car wash, DC motors, windmills generators, pasta machineries...
Our offer: Tailor made or adapted axial flow fans , centrifugal fans, mixed flow technologies, using latest technologies of composite, aluminium, mild steel or stainless steel materials, and bringing the best efficiencies to our customer, to allow them making their machine different on the market
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ROLLING STOCK
How are the fans used in the process ? • traction motor cooling (radiator). • braking resistor cooling. • transformer cooler blowers. • inverters / choppers blowers. • inductors cooling blowers. • condensors and evaporators fans.
Our offer: Fans located in Rolling Stock applications are completely tailor made. Needs can be from axial aerodynamic characteristics for transformer cooling, to high pressure centrifugal for motor and braking resistor cooling.
What differntiates Flakt Woods within the market is: • the unrivalled experience in axial and mixed flow fan technology, bringing the highest performance in acoustics and aerodynamics. • the ability to integrate our products in customer environments, • our capacity in tailored and innovative designs, like our recent development of composite solutions to eliminate fatigue and stress problems. • the ability to test the complete units in our laboratories.
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CEMENT
How are the fans used in the process ? Fans play a major role in each step of cement production: grinding of raw materials, rotary kilns, clinker cooler… Fans are located throughout the process: • raw mill fans. • exhaust fans or re-circulating fans in filtering systems. • kiln ID fans. • coal mill exhausters. • primary air fans. • clinker cooler fans. With air flows from 50 000 to 600 000 m3/h, pressures from up to 3000 to 20 000 Pa, and operating conditions between 20 °C and 500 °C, fans for cement plants are heavy duty types. The increased capacity and complexity of plants have resulted in more arduous conditions: • larger volumes. • higher pressures. • higher temperatures. • higher loads of abrasive dust.
Our offer: Fläkt Woods through Solyvent brand name has unrivalled experience in TECHNOPAL fans for cement applications, and has adapted its fan technology to cope with these requirements: • highest efficiencies (more than 85 %). • gas flow / control regulation. • command of vibration and noise. • wear protection on highly efficient impeller design. … And an innovative concept called “Hermit Crab” which consists in replacing the competitor’s impeller with one of our impellers, keeping in place the casing. Challenge is to sell an increased capacity, a better efficiency, or a longer life expectation.
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STEEL
How are the used in the process ? Fans play a major role in each step of steel production: grinding of raw materials, de-dusters, fans for the ovens, fresh air introduction, burned gasses exhausters ... Fans located in the process itself are usually submitted to high mechanical constraints: • high temperature. • heavy dusty air extraction. • cycles : anti-fatigue designs. • corrosion. For that, efficient cooling design for shaft and bearings is necessary, use of refractory materials is mandatory, and a technical innovation is a must.
Our offer: Fläkt Woods through Solyvent brand name has unrivalled experience in TECHNOPAL fans for steel applications, with continuous innovation through: • small deflector blades, positioned on the impeller centre hub, alter the dust particle trajectories, and increase impeller life expectancy by 10 times. • use of ceramic, tungsten, special stainless steels hastalloy, URANUS, rubber coatings ... • impeller water cleaning systems in running. Others fans such as large axial flow fans for air introduction, or large centrifugal exhausters for the ovens are part of our range, providing our customers with a good global efficiency and reliability.
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POWER PLANTS
How are the fans used in the process ? Fans in Power plants process are of various types, but their common point is their huge power consumption, which can only be found in that type of application. The volumes and air flows requested to allow the boilers, precipitators, pre-heaters, coal mill and fluid beds to continuously run require megawatts.
Fans in the process are: • Primary air fans. • Induced draught fans. • Forced draught fans. • Fluidization air blowers. • Mill seal air fans.
Our offer: Some Technopal centrifugal fans in double inlet form have been specially designed for power plant applications, with impellers up to 4,5 meters and 10 M Watts, it is possible to replace two or three competitor fans with one large Flakt Wods unit. With PF axial flow fan technology, Fläkt Woods innovates again in alimentation of fresh air for the boilers. Highest efficiencies up to 92 % are allowing Fläkt Woods to sell an unrivalled premium design in Centrifugal and Axial flow fans technology. Building site ventilation and Turbine Halls are all equipped with smaller axial flow fans from our standardized ranges.
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TUNNELS
What are the fans made for in the process ? • Road Tunnels - removal of pollution and smoke. • Metro and Underground Railways – removal of heat, general ventilation and fire smoke control, including antistall devices to accommodate pressure pulses. • Tunnel and Underground Construction - providing fresh air and removal of pollution, heat and dust.
Our offer: Fläkt Woods range of AXIJET / Jetfans and AXICENT / Large JM fans have provided solutions worldwide for: Our offering for these projects can range from just equipment supply to the provision of a complete subsystem. A typical offering can include dampers, attenuators, transformations sections, fans, antivibration equipment and starters / inverters. System optimisation is based on detailed knowledge of the individual system components and the interaction between them. Design calculations are also performed to confirm both aerodynamic and acoustic performance.
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WIND TUNNELS/TESTING RIGS
How are the fans used ? Fans for these specific applications are dedicated to aero acoustic, climatic and aerodynamic testing. Demanding industries usually want to check the resulting Cx or behaviour of their machine in real conditions of running: • car industries, which want to test the Cx of a car, to judge how a new car design will operate if submitted to lateral wind … • planes manufacturers who want to test mock-ups or real complete machines.
Our offer: Special tailor made axial flow fans. Fläkt Woods strength is to provide customer with full proposal and a complete unit which covers the demanded function. We can also in our facilities develop and test the installation.
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WASTE WATER
What are the fans made for in the process ? Fans dedicated to waste water applications are varied: • high pressure compressors for biological waste water treatment which creae the oxygenation in the baths. • deodorization fans. • mud drying fans. • smaller pulsators. A lot of those fans have to be able to withstand corrosive and humid environments, that’s why the use of Stainless steel 316L and Ti is often a must.
Our offer: Low operation cost compressors for biological waste water treatment. A combination of high-speed motor drive and high performance carbon fibre composite impeller elevates compressor technology to a new level. High efficiency medium pressures / high volumes centrifugals in Stainless steel for mud drying, and smaller high pressure fans for pulsators, belonging to Centripal EU product range.
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Sales Offices available World Wide See our website for details www.flaktwoods.com Head offices Building Air Climate
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Fläkt Woods AB Kung Hans väg 12 SE-192 68 SOLLENTUNA Sweden Tel: +46 8 626 49 00 Fax:+46 8 626 73 10
Fläkt Woods Limited Tufnell Way Colchester, Essex United Kingdom Tel: +44 1206 544122 Fax:+44 1206 574434
Fläkt Solyvent-Ventec 143, rue de la République - B.P. 67 69882 Meyzieu Cedex France
Fläkt Woods reserves its rights to modify the technical datas described in the document anytime. Informations are not contractual. Should you need any further information, please contact the local agent in your country.
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